Improvement in harvesters



SAMUEL cnAwFo- Rm lmpf-ovement in Harvesters.

,No 126,932. t May 21,1872.

WIZWESJZJ:

UNITED S'IAE SAMUEL CRAWFORD, OF LONDON, CANADA.

IMPROVEMENT IN HARVESTERS.

Specification forming part of Letters Patent No. 126,932, dated May 21,1872.

Specification describing certain Improvements in Reaping-Machines forHarvesting Grain, invented by SAMUEL CRAWFORD, ot the city of London, inthe Province of Ontario and Dominion of Canada.

The object of my invention is to prot'ide a convenient method ofelevating and adjusting the grain-tables of reaper-s to the desiredelevation.

Figure I is a side elcation embodying my invention. Fig. 11 is a plan ofthe same, showing the manner in which the sliding knuckle B is fitted tothe table-bracket A.

The tablebracket A is bolted securely to the table T, and is soconstructed that the knuckle-plate B may slide on it freely upward anddownward. lhe rack O is formed on the edge of the knuckle-plate B. P isa lever, on one-end of which is formed the segment D, having cogs, whichwork into the corresponding cogs of the rack (J. E is a rack-bar, having notches to receive the latch with which the lever P is furnished, andin connection with which it is intended to hold the lever in itsposition as adjusted. I prefer making the tablebracket A to extend backto the point F, for convenience in adjusting thepivot or fulcrum F to.the proper distance from the rack O. The arm G and grain-wheel H areconstructed and arranged and work in the ordinal Y manner.

The front of the machine is indicated by the direction of the arrow.

To lower the grain-table T, I disengage the latch L from the rack-bar Eand press the lever P downward. The knuckle plate B is thereby forcedupward on the table-bracket A and the grain-table T loweredcorrespoinliligly. To elevate the grain -table, I disengage the lever,as above described, and press it upward. The knuckle-plate B is thusforced downward on the table bracket A and the table T elevatedcorrespondingly, the rack-bar E always holding the apparatus asadjusted.

I claim- As animproved device for raising and lowerin g the outer end ofthe platform in reapingmachines, the combination of the plate B, formedwith a rack, 0, upon its rear edge,sliding on a guide'flange onthebracket A, and carrying the grain wheel H; the lever P, formed with as gment, D, gearing with the rack G, and fulcrumed upon the bracket A'ata point, F, in rear of the sliding plate B; and the rack-bar E forsecuring the lever P in any position; the said parts being constructedand arranged to operate in the manner herein set forth.

Witnesses: SAMUEL CRAWFORD.

M. J. MOLAUCHLIN, It. BANKS BARBER.

